Espaliers
(espalier 的复数) n. 墙树, 树篱
🗣️ 情景例句
I need to make an appointment with you tonight.
我想今晚约你。
Laws catch flies but let hornets go free.
法网只捉苍蝇，不捉黄蜂。
and by measuring the time interval between the taps and the receipt of the echoes, the depth of the sea at that point can be calculated.
测出回声间隔的时间，便可算出该处海洋的深度。